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A swimmer crosses a flowing stream of width ω to and fro in time t1. The time taken to cover the same distance up & down the stream is t2 . if t3 is the time swimmer would take to swim a distance 2ω in still water, then:
18
Oct
A swimmer crosses a flowing stream of width ω to and fro in time t1. The time taken to cover the same distance up & down the stream is t2 . if t3 is the time swimmer would take to swim a distance 2ω in still water, then: Two particles are moving with velocities v1 [...]
A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The car moves horizontally with a speed of 2m/s. At what angle α with the vertical should the wind screen be placed so that the rain drops falling vertically downwards with velocity 6m/s strike the wind screen perpendicularly?
18
Oct
A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The car moves horizontally with a speed of 2m/s. At what angle α with the vertical should the wind screen be placed so that the rain drops falling vertically downwards with velocity 6m/s strike the wind screen perpendicularly? [...]
A newly prepared radioactive nuclide has a decay constant lemda of 10^-6 s^-1. What is the approximate half-life of the nuclide ?
18
Oct
A newly prepared radioactive nuclide has a decay constant lemda of 10^-6 s^-1. What is the approximate half-life of the nuclide ? A newly prepared radioactive nuclide has a decay constant lemda of 10^-6 s^-1. What is the approximate half-life of the nuclide ? October 18, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]
The rest mass of a deuteron is equivalent to an energy of 1876 MeV, that of a proton to 939 MeV, and that of a neutron to 940 MeV. A deuteron may disintegrate to a proton and a neutron
18
Oct
The rest mass of a deuteron is equivalent to an energy of 1876 MeV, that of a proton to 939 MeV, and that of a neutron to 940 MeV. A deuteron may disintegrate to a proton and a neutron and that of a neutron to 940 MeV. A deuteron may disintegrate to a proton and [...]
The hysteresis loss for a specimen of iron weighing 12 kg is equivalent to 300 J/m^3 cycle . Find the loss of energy per hour at 50 cylcles /s. Given , density of iron = 7500 kg/m^3.
18
Oct
The hysteresis loss for a specimen of iron weighing 12 kg is equivalent to 300 J/m^3 cycle . Find the loss of energy per hour at 50 cylcles /s. Given , density of iron = 7500 kg/m^3. density of iron = 7500 kg/m^3. The hysteresis loss for a specimen of iron weighing 12 kg is [...]
The fission of a heavy nucleus gives, in general, two smaller nuclei, two or three neutrons, some beta-particles, and some gama-radiations. It is always true that the nuclei produced
18
Oct
The fission of a heavy nucleus gives, in general, two smaller nuclei, two or three neutrons, some beta-particles, and some gama-radiations. It is always true that the nuclei produced and some gama-radiations. It is always true that the nuclei produced in general some beta-particles The fission of a heavy nucleus gives two or three neutrons [...]
The minimum frequency of a gama ray that causes a deuteron to disintegrate into a proton and a neutron is (md = 2.0141 amu, mp = 1.0078 amu, mn = 1.0087 amu.)
18
Oct
The minimum frequency of a gama ray that causes a deuteron to disintegrate into a proton and a neutron is (md = 2.0141 amu, mp = 1.0078 amu, mn = 1.0087 amu.) mn = 1.0087 amu.) mp = 1.0078 amu The minimum frequency of a gama ray that causes a deuteron to disintegrate into a [...]
The initial activity of a certain radioactive isotope was measured as 16000 counts / min. Given that the only activity measured was due to this isotope and that its activity after 12 h was
18
Oct
The initial activity of a certain radioactive isotope was measured as 16000 counts / min. Given that the only activity measured was due to this isotope and that its activity after 12 h was The initial activity of a certain radioactive isotope was measured as 16000 counts / min. Given that the only activity measured [...]
In the case of thorium (A = 232 and Z = 90), we obtain an isotope of lead (A = 208 and Z = 82) after some radioactive disintegrations. The number of alpha and beta particles emitted are, respectively,
18
Oct
In the case of thorium (A = 232 and Z = 90), we obtain an isotope of lead (A = 208 and Z = 82) after some radioactive disintegrations. The number of alpha and beta particles emitted are, respectively, In the case of thorium (A = 232 and Z = 90) respectively we obtain an [...]
A rowland ring has 10^3 turns per unit length. On passing a current of 2 A, magnetic induction is measured to be 1.5 Wb/m^2. calculate ( a) relative permeability of the core, (b) magnetic susceptibility , (c) magnetizing field intensity and (d) magnetization.
18
Oct
A rowland ring has 10^3 turns per unit length. On passing a current of 2 A, magnetic induction is measured to be 1.5 Wb/m^2. calculate ( a) relative permeability of the core, (b) magnetic susceptibility , (c) magnetizing field intensity and (d) magnetization. (b) magnetic susceptibility (c) magnetizing field intensity and (d) magnetization. A rowland [...]